package thread;

public class ThreadDemo1 {//定义一个类继承thread
    public static void main(String[] args) {
        Thread t1 =new MyThread1();
        Thread t2 =new MyThread2();

        t1.start();
        t2.start();
    }
}

class MyThread1 extends Thread{
    public void  run(){
        for (int i = 0; i <1000 ; i++) {
            System.out.println("你是谁?");
        }
    }
}

class MyThread2 extends Thread{
    public void run(){
        for (int i = 0; i <1000 ; i++) {
            System.out.println("开门,查水表的");
        }
    }
}